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Journal Article
A 6–18-GHz GaAs Multifunction Chip With 8-bit True Time Delay and 7-bit Amplitude Control
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- Authors
- Jin-Cheol Jeong, In-Bok Yom, Jae-Duk Kim, Wang-Yong Lee, Chang-Hoon Lee
- Issue Date
- 2018-05
- Citation
- IEEE Transactions on Microwave Theory and Techniques, v.66, no.5, pp.2220-2230
- ISSN
- 0018-9480
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- This paper presents a monolithic microwave integrated circuit multifunction chip implemented using a 0.25-μ m gallium arsenide pseudomorphic high-electron-mobility transistor process for use in a phased array jammer transmitter. This chip, which operates in the frequency range of 6-18 GHz, provides several functions including 8-bit true time delay (TTD), 7-bit attenuation, wideband amplification, and digital serial-to-parallel conversion for 15-bit control. The TTD and attenuation coverage are 255 ps with a step of 1 ps and 31.75 dB with a step of 0.25 dB, respectively. The TTD employing an artificial transmission line configuration demonstrates a root-mean-square delay error of less than 1.7 ps in the operating frequency range. The chip has a compact size of 4, m × 5 mm and exhibits a typical gain of 12 dB and an output P1dB of 16.5 dBm over a frequency range of 6-18 GHz.
- KSP Keywords
- 18 GHz, Amplitude control, Compact size, Delay error, Gallium Arsenide, High-electron mobility transistor(HEMT), Microwave Integrated Circuits(MICs), Microwave monolithic integrated circuits(MMIC), Root-Mean-Square(RMS), Serial-to-parallel conversion, artificial transmission line